knxd: fix musl compatibility

Signed-off-by: Othmar Truniger <github@truniger.ch>

net/knxd/Makefile

@@ -11,12 +11,12 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=knxd
-PKG_VERSION=2015-06-02-$(PKG_SOURCE_VERSION)
+PKG_VERSION=2015-06-27-$(PKG_SOURCE_VERSION)
 PKG_RELEASE:=1
 
 PKG_SOURCE_PROTO:=git
 PKG_SOURCE_URL:=https://github.com/knxd/knxd.git
-PKG_SOURCE_VERSION:=3d3b1a5e8112397d297625d673a2a94507f9ebce
+PKG_SOURCE_VERSION:=50e7f6e6bfa13c2b6140b0f76aaa70234bf44b1d
 PKG_SOURCE_SUBDIR:=$(PKG_NAME)
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_SOURCE_VERSION).tar.gz
 

net/knxd/patches/0100-musl-compat

@@ -0,0 +1,10 @@
+--- a/src/examples/common.h	2015-06-27 15:20:15.266563893 +0200
++++ b/src/examples/common.h	2015-06-27 15:23:09.406457392 +0200
+@@ -20,6 +20,7 @@
+ #include <stdlib.h>
+ #include <errno.h>
+ #include <unistd.h>
++#include <sys/select.h>
+ #include "eibclient.h"
+ 
+ /** unsigned char*/